package com.example.demo.waiguan;



/**
 * @Description
 * @Author youxin
 * @Version V1.0.0
 * @Since 1.0
 * @Date 2022/1/17
 */
public class Screen {
    private static Screen screen=new Screen();
    private Screen(){}
    public static Screen getScreen(){
        return screen;
    }
    public void open(){
        System.out.println("大屏打开");
    }
    public void off(){
        System.out.println("大屏关闭");
    }

}
